Red Line 75W90

Our most popular gear oil, this is the preferred product in nearly all
car and light truck differentials, both conventional and limited-slip.
75W90 is preferred for most racing applications. It contains friction
modifier which is recommended for limited-slip units. 75W90 Gear Oil
can be used in many transmissions and transaxles; however, other Red
Line lubricants have better frictional properties for rapid
synchronization. Exceeds API GL-5.